If the train moves sufficiently fast, is it possible, according to experimenters on the ground, for the entire train to be inside the tunnel at one instant of time?

Explanation:

One of the consecuences of Special Theory of Relativity is that when bodies move its length in the direction of the movement will decrease, and decrease will become bigger as speed goes up. At speed close to speed of light such decrease could be such as to make train become a point, of course tunnel is fixed it will not change, but close to light speed means somethyng like 300000 km/sec therefore could be just one instant of time inside tunnel no matter how long it is  

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.